Guy, you hit what I've been thinking on the head.
I think the high ISO performance really will be ok once the hardware is fixed and I can blow out highlights to get a good exposure in the midtones. My night street shots / moonlit shots have shown this. Is it as good as the 1ds2 at 3200? No... but it's not nearly unprintable or anything...
That's really the only "anti-reportage thing" but honestly you still need light

Noctilux, here I come!
But your whole thread is begging the question. If I ever get through my printing backlog, I have four or five studio assignments over the next few months that are all going to be M8. Not DMR. Heck--by then I might even have filters!!
Interesting, no?
The M8 just punches wayyy beyond its weight, in my books. It's actually better for wide ranging light than the DMR--and I love my DMR.
So now I've got two dSLRS left... the DMR and the 5d.... and I bet both of them become more and more "special purpose" for me. Not to mention the M8 goes with me pretty much everywhere, too. That I really like.